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5a82c74822
Also, change sources.redhat.com to sourceware.org.
This patch was automatically generated by running the following shell
script, which uses GNU sed, and which avoids modifying files imported
from upstream:
sed -ri '
s,(http|ftp)(://(.*\.)?(gnu|fsf|sourceware)\.org($|[^.]|\.[^a-z])),https\2,g
s,(http|ftp)(://(.*\.)?)sources\.redhat\.com($|[^.]|\.[^a-z]),https\2sourceware.org\4,g
' \
$(find $(git ls-files) -prune -type f \
! -name '*.po' \
! -name 'ChangeLog*' \
! -path COPYING ! -path COPYING.LIB \
! -path manual/fdl-1.3.texi ! -path manual/lgpl-2.1.texi \
! -path manual/texinfo.tex ! -path scripts/config.guess \
! -path scripts/config.sub ! -path scripts/install-sh \
! -path scripts/mkinstalldirs ! -path scripts/move-if-change \
! -path INSTALL ! -path locale/programs/charmap-kw.h \
! -path po/libc.pot ! -path sysdeps/gnu/errlist.c \
! '(' -name configure \
-execdir test -f configure.ac -o -f configure.in ';' ')' \
! '(' -name preconfigure \
-execdir test -f preconfigure.ac ';' ')' \
-print)
and then by running 'make dist-prepare' to regenerate files built
from the altered files, and then executing the following to cleanup:
chmod a+x sysdeps/unix/sysv/linux/riscv/configure
# Omit irrelevant whitespace and comment-only changes,
# perhaps from a slightly-different Autoconf version.
git checkout -f \
sysdeps/csky/configure \
sysdeps/hppa/configure \
sysdeps/riscv/configure \
sysdeps/unix/sysv/linux/csky/configure
# Omit changes that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/powerpc/powerpc64/ppc-mcount.S: trailing lines
git checkout -f \
sysdeps/powerpc/powerpc64/ppc-mcount.S \
sysdeps/unix/sysv/linux/s390/s390-64/syscall.S
# Omit change that caused a pre-commit check to fail like this:
# remote: *** error: sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S: last line does not end in newline
git checkout -f sysdeps/sparc/sparc64/multiarch/memcpy-ultra3.S
71 lines
2.2 KiB
C
71 lines
2.2 KiB
C
/* Round to nearest integer value, rounding halfway cases to even.
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flt-32 version.
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Copyright (C) 2016-2019 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Lesser General Public
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License as published by the Free Software Foundation; either
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version 2.1 of the License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public
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License along with the GNU C Library; if not, see
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<https://www.gnu.org/licenses/>. */
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#include <math.h>
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#include <math_private.h>
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#include <libm-alias-float.h>
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#include <stdint.h>
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#define BIAS 0x7f
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#define MANT_DIG 24
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#define MAX_EXP (2 * BIAS + 1)
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float
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__roundevenf (float x)
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{
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uint32_t ix, ux;
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GET_FLOAT_WORD (ix, x);
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ux = ix & 0x7fffffff;
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int exponent = ux >> (MANT_DIG - 1);
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if (exponent >= BIAS + MANT_DIG - 1)
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{
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/* Integer, infinity or NaN. */
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if (exponent == MAX_EXP)
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/* Infinity or NaN; quiet signaling NaNs. */
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return x + x;
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else
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return x;
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}
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else if (exponent >= BIAS)
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{
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/* At least 1; not necessarily an integer. Locate the bits with
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exponents 0 and -1 (when the unbiased exponent is 0, the bit
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with exponent 0 is implicit, but as the bias is odd it is OK
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to take it from the low bit of the exponent). */
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int int_pos = (BIAS + MANT_DIG - 1) - exponent;
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int half_pos = int_pos - 1;
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uint32_t half_bit = 1U << half_pos;
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uint32_t int_bit = 1U << int_pos;
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if ((ix & (int_bit | (half_bit - 1))) != 0)
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/* Carry into the exponent works correctly. No need to test
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whether HALF_BIT is set. */
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ix += half_bit;
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ix &= ~(int_bit - 1);
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}
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else if (exponent == BIAS - 1 && ux > 0x3f000000)
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/* Interval (0.5, 1). */
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ix = (ix & 0x80000000) | 0x3f800000;
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else
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/* Rounds to 0. */
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ix &= 0x80000000;
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SET_FLOAT_WORD (x, ix);
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return x;
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}
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libm_alias_float (__roundeven, roundeven)
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